3. Bond , Anchorage and Shear • This chapter will discuss ...

3. bond , Anchorage and Shear This chapter will discuss the following topics: Outline the theory of calculating the Anchorage bond length. Determination of Anchorage bond length tension lap Determination of Anchorage bond length, tension lap length and compression lap length by using Table Table of the code. Outline the design formulae for the design of Shear reinforcement and the use of Table the Code. RC Design and Construction HKC 2004 (2ndEdition)3-13. bond , Anchorage and Shear Minimum Distance Between Bars The min. distance between bars are given in terms ofh(themaximumsizeofaggregate)hagg(thema ximumsizeofaggregate).ClearHorizontaland VerticalDistancebetweenbars ClearHorizontalandVerticalDistancebetwee nbars bardiameteror bardiameteror (hagg+ 5mm) or 20mmwhicheverisgreater Design and Construction HKC 2004 (2ndEdition) Minimum and Maximum Percentages of Reinforcement in Beams, Slabs and Columns Minimum % : Table the code Maximum %(a) Beam ( )Neither the area of tension reinforcement nor the area of compression preinforcement should exceed 4% of the gross cross-sectional

3.2 Anchorage Bond L = Min. anchorage length to prevent pull out. φ = Bar size or nominal diameter. fbu= Ultimate anchorage bond stress. fs = Direct tensile or compressive stress in the bar. Consider the forces on the bar, Tensile pull-out force = Area of bar * Stress of bar

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  Bond, Anchorage, Anchorage bond

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